---------------------------------------------------------- Tailwind-List Digest Archive --- Total Messages Posted Fri 05/07/04: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:50 AM - Re: Cabin noise (Rich Ellis) 2. PM - stick it in a cute blonde tonight! 15 (jan) ________________________________ Message 1 _____________________________________ Time: 05:50:33 AM PST US From: Rich Ellis Subject: Re: Tailwind-List: Cabin noise --> Tailwind-List message posted by: Rich Ellis Red, Very interesting information. It would be of most interest to see the difference in db before and after noise deadening was added to your W10. rle --- red wrote: > I've got some: > > O320 W-10 with 8lbs of sound barrier and absorber; > and upholstery > > dB taxi climb 2500 > cruise 2000cruise > > Ear level 92 108 108 > 102 > Windshield 93 > Lap 87 > > I have since changed mufflers and gotten about 2 dB > less in cruise. I want to try the dive to 250 with > closed throttle and see what that noise level is, as > suggested. that would tend to isolate wind noise > from engine noise. For the record, same meter, same > w10, before any door seals or sound deadening, but > with upholstery, 117 at high cruise! say what? > > Cessna 180, not generally thought of as a quiet > a/c,1953 with O470U, Beech mufflers, no sound > deadening on firewall,standard windshield and side > windows, same categories, same meter > > 86 102 > 98 94 > > Red Hamilton > 374WT > > > ----- Original Message ----- > From: Dave Conrad > To: tailwind-list@matronics.com > Sent: Thursday, May 06, 2004 8:11 PM > Subject: Re: Tailwind-List: Cabin noise > > > It would be interesting to know what the same > meter would read in a Cessna 172 or warrior. Dave > Conrad > On Thursday, May 6, 2004, at 08:19 AM, DaveM > wrote: > > > I visited Red Hamilton at Ft. Bragg, and we got > to talking about noise levels in the Tailwind. He > has been taking readings in his new one, and adding > some sound deadening material. He loaned me his > sound meter, and I took the following readings in > N168A (Clement trike) on the way back to Yolo > County. Thought the group might be interested. > > Here are the results: > > DB Taxi Runup Climb > Cruise (2500) Slo Cruise (2000) > Ear level 94 104 > 106 104-6 94 > Windshield 93 105 108 > 109-114 95 > Lap level 90 104 > 107 106 94 > > As you can see, the levels are fairly high, no > matter where in the cabin it is measured. I think > the meter is set to average sound intensity over a > short (1 sec or so) interval. > Dave > N202Q > N168A > > ===== Richard L. Ellis, M.D. Gundersen Lutheran Health System Co-Director Norma J. Vinger Center for Breast Care 1900 South Avenue La Crosse, WI 54601 800.362.9567, ext. 52102 rjrellis@yahoo.com __________________________________ http://hotjobs.sweepstakes.yahoo.com/careermakeover ________________________________ Message 2 _____________________________________ From: "jan" Subject: stick it in a cute blonde tonight! 15